Bulk Writer — Flipper Zero Facility Code Tag Reprogrammer

Bulk-program 125kHz RFID cards with preset facility codes. Designed for hands-free batch processing of access control cards.

✨ Features

• 📱 Reference Card Scan — Scan a sample card to auto-detect protocol and modulation (ASK/PSK), locking the reader for faster subsequent scans
• ⚙️ Manual Modulation Select — Choose ASK, PSK, or Auto
• 🔧 Configurable Facility Code — 0–255
• 3️⃣ Three Card Number Modes — Preserve original, Sequential from base, or Fixed value
• 🔊 Audible + Visual Feedback — Distinct ascending beep (success) / descending buzz (failure), LED colors per state
• ⏭️ Auto-Resume — No button press needed between cards
• 💾 Persistent Settings — Config saved to SD card via FlipperFormat

🔧 Supported Protocols (125kHz LF)

Protocol	Format	Writable Cards	Modulation
HID H10301	26-bit (8-bit FC + 16-bit CN)	T5577 blanks	ASK
EM4100	40-bit (8-bit FC + 32-bit ID)	T5577 blanks	ASK
Indala26	26-bit (8-bit FC + 16-bit CN, scattered bits)	T5577 blanks	PSK
AWID	26-bit (8-bit FC + 16-bit CN, Wiegand parity)	T5577 blanks	PSK
IoProxXSF	26-bit (8-bit FC + 16-bit CN)	T5577 blanks	PSK
Pyramid	26-bit (8-bit FC + 16-bit CN)	T5577 blanks	PSK
Paradox	26-bit (8-bit FC + 16-bit CN, CRC checksum)	T5577 blanks	PSK

Note: Factory HID ProxII and genuine EM4100 cards are read-only. This app only works with T5577-based rewritable LF cards.

🚀 Installation

Quick Download (Recommended)

Download: bulk_writer.fap

Installation Steps

1. Download the .fap file
2. Copy to your SD card: SD Card/apps/RFID/bulk_writer.fap
3. Refresh apps on your Flipper (Applications → Browser → Search)

Method 2: Build from Source

# Install ufbt if you haven't already
pip install ufbt

# Clone and build
git clone https://github.com/b0bby225/BulkWriter.git
cd BulkWriter
ufbt

The compiled .fap will be in dist/bulk_writer.fap.

🎮 Controls

Screen	Controls
Setup	Up/Down = navigate, Left/Right = adjust, Right on Mod = Scan Reference
Processing	Left/Back = Stop
Summary	OK/Back = New batch

🎯 Usage Workflow

1. Open Bulk Writer from Apps → RFID
2. Configure Settings:
   • Set your target Facility Code (0-255)
   • Choose Card Number mode (Preserve/Sequential/Fixed)
   • Select Modulation (Auto/ASK/PSK)
3. (Recommended) Scan Reference Card:
   • Navigate to Mod row and press Right
   • Place a sample card to auto-detect protocol and lock modulation
4. Press OK to start bulk processing
5. Place cards on the reader one at a time
6. Listen for feedback:
   • Success: Ascending beep + green LED
   • Failure: Descending buzz + red LED
7. Press Left/Back to stop and view session summary

🔧 Modulation Options

• Auto — Tries both ASK and PSK (slowest, maximum compatibility)
• ASK — HID H10301, EM4100 cards only (fastest for common cards)
• PSK — Indala, AWID, IoProx, Pyramid, Paradox cards (fastest for PSK cards)

Pro Tip: Use reference scanning to auto-detect and lock the optimal modulation for your card batch!

📋 Requirements

• Cards: T5577-based rewritable LF cards only
• Flipper Zero: Latest firmware

🏷️ License

MIT License — see LICENSE for details.

👨‍💻 Author

Bobby Gibbs (@b0bby225)

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